1. Windows Central Question's Avatar
    If I use the insider program on my Lumia 640, when or if Tmobile updates to windows 10 will I have to downgrade? Is there any problems going back, because I read something a while ago that there was? I know Tmobile released a update in Eur but US takes forever.
    03-08-2016 08:54 PM
  2. gordonfink's Avatar
    If I use the insider program on my Lumia 640, when or if Tmobile updates to windows 10 will I have to downgrade? Is there any problems going back, because I read something a while ago that there was? I know Tmobile released a update in Eur but US takes forever.
    At worst, I would think you could use the WDRT to install official TMo release, but I don't know if you'll need to.
    RumoredNow likes this.
    03-08-2016 08:56 PM
  3. RumoredNow's Avatar
    There is a new "Production" ring.

    That should deliver the firmware to you once W10M goes official.


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    03-08-2016 09:12 PM

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